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Standard ACLs

Jul 08,2009 by alperen

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This section includes examples of standard IP ACLs with various wildcard Mask options to perform the following security-related tasks.

Traffic filtering
Limiting access to Telnet sessions
Limiting access to HTTP sessions
Filtering routing updates
Limiting the debug ip packet analysis and, therefore, CPU use

Before looking at these examples, let’s look at a technique that can be used in test labs to make a limited pool of devices look more diverse. In some of the next exercises, having more than one LAN interface on the routers would be useful, but this isn’t required. The next section looks at using loopback interfaces as a simple work-around in the lab.

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